/* Copyright Oliver Kowalke 2009. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) */ /******************************************************* * * * ------------------------------------------------- * * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * * ------------------------------------------------- * * | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | * * ------------------------------------------------- * * | TOC | R14 | R15 | R16 | * * ------------------------------------------------- * * ------------------------------------------------- * * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * * ------------------------------------------------- * * | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | * * ------------------------------------------------- * * | R17 | R18 | R19 | R20 | * * ------------------------------------------------- * * ------------------------------------------------- * * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | * * ------------------------------------------------- * * | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | * * ------------------------------------------------- * * | R21 | R22 | R23 | R24 | * * ------------------------------------------------- * * ------------------------------------------------- * * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | * * ------------------------------------------------- * * | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | * * ------------------------------------------------- * * | R25 | R26 | R27 | R28 | * * ------------------------------------------------- * * ------------------------------------------------- * * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | * * ------------------------------------------------- * * | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | * * ------------------------------------------------- * * | R29 | R30 | R31 | hidden | * * ------------------------------------------------- * * ------------------------------------------------- * * | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | * * ------------------------------------------------- * * | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 | * * ------------------------------------------------- * * | CR | LR | PC | back-chain| * * ------------------------------------------------- * * ------------------------------------------------- * * | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | * * ------------------------------------------------- * * | 192 | 196 | 200 | 204 | 208 | 212 | 216 | 220 | * * ------------------------------------------------- * * | cr saved | lr saved | compiler | linker | * * ------------------------------------------------- * * ------------------------------------------------- * * | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | * * ------------------------------------------------- * * | 224 | 228 | 232 | 236 | 240 | 244 | 248 | 252 | * * ------------------------------------------------- * * | TOC saved | FCTX | DATA | | * * ------------------------------------------------- * * * *******************************************************/ .file "jump_ppc64_sysv_elf_gas.S" .globl jump_fcontext #if _CALL_ELF == 2 .text .align 2 jump_fcontext: addis %r2, %r12, .TOC.-jump_fcontext@ha addi %r2, %r2, .TOC.-jump_fcontext@l .localentry jump_fcontext, . - jump_fcontext #else .section ".opd","aw" .align 3 jump_fcontext: # ifdef _CALL_LINUX .quad .L.jump_fcontext,.TOC.@tocbase,0 .type jump_fcontext,@function .text .align 2 .L.jump_fcontext: # else .hidden .jump_fcontext .globl .jump_fcontext .quad .jump_fcontext,.TOC.@tocbase,0 .size jump_fcontext,24 .type .jump_fcontext,@function .text .align 2 .jump_fcontext: # endif #endif # reserve space on stack subi %r1, %r1, 184 #if _CALL_ELF != 2 std %r2, 0(%r1) # save TOC #endif std %r14, 8(%r1) # save R14 std %r15, 16(%r1) # save R15 std %r16, 24(%r1) # save R16 std %r17, 32(%r1) # save R17 std %r18, 40(%r1) # save R18 std %r19, 48(%r1) # save R19 std %r20, 56(%r1) # save R20 std %r21, 64(%r1) # save R21 std %r22, 72(%r1) # save R22 std %r23, 80(%r1) # save R23 std %r24, 88(%r1) # save R24 std %r25, 96(%r1) # save R25 std %r26, 104(%r1) # save R26 std %r27, 112(%r1) # save R27 std %r28, 120(%r1) # save R28 std %r29, 128(%r1) # save R29 std %r30, 136(%r1) # save R30 std %r31, 144(%r1) # save R31 #if _CALL_ELF != 2 std %r3, 152(%r1) # save hidden #endif # save CR mfcr %r0 std %r0, 160(%r1) # save LR mflr %r0 std %r0, 168(%r1) # save LR as PC std %r0, 176(%r1) # store RSP (pointing to context-data) in R6 mr %r6, %r1 #if _CALL_ELF == 2 # restore RSP (pointing to context-data) from R3 mr %r1, %r3 #else # restore RSP (pointing to context-data) from R4 mr %r1, %r4 ld %r2, 0(%r1) # restore TOC #endif ld %r14, 8(%r1) # restore R14 ld %r15, 16(%r1) # restore R15 ld %r16, 24(%r1) # restore R16 ld %r17, 32(%r1) # restore R17 ld %r18, 40(%r1) # restore R18 ld %r19, 48(%r1) # restore R19 ld %r20, 56(%r1) # restore R20 ld %r21, 64(%r1) # restore R21 ld %r22, 72(%r1) # restore R22 ld %r23, 80(%r1) # restore R23 ld %r24, 88(%r1) # restore R24 ld %r25, 96(%r1) # restore R25 ld %r26, 104(%r1) # restore R26 ld %r27, 112(%r1) # restore R27 ld %r28, 120(%r1) # restore R28 ld %r29, 128(%r1) # restore R29 ld %r30, 136(%r1) # restore R30 ld %r31, 144(%r1) # restore R31 #if _CALL_ELF != 2 ld %r3, 152(%r1) # restore hidden #endif # restore CR ld %r0, 160(%r1) mtcr %r0 # restore LR ld %r0, 168(%r1) mtlr %r0 # load PC ld %r12, 176(%r1) # restore CTR mtctr %r12 # adjust stack addi %r1, %r1, 184 #if _CALL_ELF == 2 # copy transfer_t into transfer_fn arg registers mr %r3, %r6 # arg pointer already in %r4 # jump to context bctr .size jump_fcontext, .-jump_fcontext #else # zero in r3 indicates first jump to context-function cmpdi %r3, 0 beq use_entry_arg # return transfer_t std %r6, 0(%r3) std %r5, 8(%r3) # jump to context bctr use_entry_arg: # copy transfer_t into transfer_fn arg registers mr %r3, %r6 mr %r4, %r5 # jump to context bctr # ifdef _CALL_LINUX .size .jump_fcontext, .-.L.jump_fcontext # else .size .jump_fcontext, .-.jump_fcontext # endif #endif /* Mark that we don't need executable stack. */ .section .note.GNU-stack,"",%progbits